Charge pump circuit
AssigneeMitsubishi Electric Corporation
InventorsNaruki SUETAKE, Takamasa ASAI, Kenichi FUJIE
Life of this patent
Estimating the term…
Abstract
The present invention has: a pump capacitor (12), which has one end thereof connected to the source power supply (B) side via a diode (7), and which has the other end thereof connected to two kinds of voltage sources via switches (3, 4); and an output capacitor (13), which has one end there of connected to a high-potential terminal of a pump capacitor via a diode (8), and the other end thereof connected to a source power supply. A filter circuit configured with a resistor (15) and a capacitor (11) is provided between the source power supply and the diode (7).
Claims4
A charge pump circuit comprising:
- a pump capacitor whose one end is connected with a source power supply side via a first reverse-current prevention element so that a charging current is supplied thereto and whose other end is connected with two kinds of voltage sources via switches;
- and
- an output capacitor whose one end is connected with a high-potential terminal of the pump capacitor via a second reverse-current prevention element so that a charging current from the pump capacitor is supplied thereto via the second reverse-current prevention element and whose other end is connected with the source power supply, wherein a filter circuit configured with a resistor and a capacitor is provided between the source power supply and the first reverse-current prevention element, and the connection point of the resistor and the capacitor of the filter circuit and one end of the first reverse-current prevention element are connected with each other.
Dependencies are inferred from the claim text.